Headaches, numb hands and dizziness are the three main symptoms of a bum neck. Keep it strong by alternately pushing your head forward and then back against your cupped palm for a count of 10 several times a day. Keep your neck supple by gently moving it forward, backward and sideways.

One in every three people over the age of 75 suffers from at least one major fall each year, and falling can be deadly. Those in midlife should include balance exercises in their repertoire of fitness workouts. Stand on one leg for half a minute, then the other -- four or five minutes a day.

Your back is your main pillar. It needs to carry you through your whole life journey, which means that you should buttress it with regular exercise and flexing. If you don't, it will start to ache and diminish the quality of your later years.

Stretching probably gets even more important as you age because stiffness and loss of elasticity are part of the aging process. Be sure you put your muscles through their full range of exertion at least twice each week.

Many people who are 80 years old can no longer climb a flight of stairs, lift 10 pounds, or even get out of a chair. They are frail because they stopped moving. If a muscle isn't used, it shrinks. So start a strength-training program and stick with it.

Three hours of life can be gained for every hour spent exercising -- a good bargain, no? The timing of exercise is not so crucial. What is crucial is that it is done regularly -- not episodically, in extreme cold or heat, or in an initial burst.

Yes, those muscles! You may have noticed that since the onset of menopause, your orgasms have been less intense. Strengthening your vagina with Kegel exercises will enable you to once again experience stronger orgasms. To perform Kegels, squeeze your pelvic muscles as though you are trying to hold back urine. Hold this position for a count of 10, then release slowly. Do this 10 times, four times a day.

Physical activity can greatly affect your cholesterol levels. By exercising, you raise your metabolism and burn calories, losing fat weight. Exercise, while lowering total cholesterol, also increases the good HDL cholesterol, which helps prevent plaque from forming on the walls of the arteries.

You guessed it -- for the rest of your life. As your body ages, your bones thin and your muscle mass begins to decrease, making you more susceptible to serious injury. Only strength training can reverse the tide and prevent atrophy.

That means six days a week for the rest of your life. Exercise sends a constant "grow" message to override the crazy tide of aging. It tells your body to get stronger, more limber and functionally younger in the only language your body understands.